What is an Init block in Kotlin?

Answer

The init block is an initializer block in Kotlin classes.

Functionality

• It runs immediately after the primary constructor.
• It is used to run startup logic that requires the class properties to be initialized.
• You can have multiple init blocks; they execute in the order they appear in the class body.
• It is often used because the primary constructor cannot contain code (only property declarations).

Example

Copy codeclass User(val name: String) {
    val upperName: String
    
    init {
        println("Initializing User: $name")
        upperName = name.uppercase()
    }
}